Comparison of optical and conventional measurement techniques for experimental modal analysis of CFRP aero engine components

摘要

Today, carbon fiber reinforced plastics (CFRP) are frequently used for light weight structure components of modern aero engines. In order to obtain reliable simulation results e.g. from Finite Element analyses, model validation of the related component models is mandatory and demands for highly accurate experimental data. Now, in this paper, different measurement scenarios for experimental modal analysis of CFRP aero engine structures will be applied to a typical CFRP structure. From the experiences made and the test results obtained the individual test scenarios will be evaluated and classified with respect to time, cost, and accuracy issues in order to provide guidance for choosing the optimal test setup for testing CFRP structures of aero engines especially with respect to the demands of subsequent model validation.